Removing Paper Lines

This is a solution to a problem posted in Stackoverflow where a user asked to remove paper lines while keeping the drawing in a good condition.

The decision was to handle the paper seperated from the drawing to get the best results using morphology operations and inpaint.

https://stackoverflow.com/questions/71425968/remove-horizontal-lines-with-open-cv/71475252#71475252

Original image

First Mask

First inpaint

Second Mask

Second inpaint